EU Alternative to Photo backup - Tried PixelUnion and zeitkapsl

Currently pay Apple $0.99/month for increased iCloud storage (basically for photos). Want to switch to an EU company.

Tried zeitkapsl and it would take days to transfer my photos with their app; very slow.

Tried PixelUnion.eu and after registration just get random errors on their websiste.

What alternatives do I have?

Proton Drive?